This is a case for a Raspberry PI 2 or 3 with attached ks0212 4-relay board and a mount plate to mount the case e.g. to a wall. For the assembly of the case and for attaching the assembled case to the mount plate, no screws or tools are required. I made this to cover three Raspberry Pi with the Relay Board used for home automation, for switching on my 3d printer & lights using octopi and for my astronomical observatory. Details can be found on: https://astrohd.de
Update: July, 5th 2018: Added a tray for Geeetech i3 / Prusa to mount the case atop an i3 printer without screws.